3种鱼群个体间距的计算方法比较  

Comparative study on the distance measurements among individuals in the fish school by three methods

作　　者：张仲秋[1] 周应祺[1,2,3] 钱卫国[1,2,3] 王明[4] 王军[1] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]上海海洋大学大洋生物资源开发和利用上海市高校重点实验室,上海201306 [3]上海海洋大学大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306 [4]上海海洋大学信息学院,上海201306

出　　处：《上海海洋大学学报》2012年第5期750-755,共6页Journal of Shanghai Ocean University

基　　金：国家公益性行业(农业)科研专项(201003024);上海市捕捞学重点学科建设项目(S30702)

摘　　要：对实验室水族箱中的鱼群空间分布状态进行录像,采用质心法、线段法和三点折线法计算个体间距离。结果表明,由3种方法计算获得的个体间距值均随着群体的个体尾数的增加而趋近于0.5～2倍体长(BL)的范围内。线段法与三点折线法的计算结果基本相同,而质心法的计算结果的精度低于其它两种方法。在间距大于0.2 BL时,三点折线法计算得到的个体间距的频率分布普遍高于线段法,计算结果更准确。同时线段法和三点质心法所获得的个体间距在0.6～0.8 BL范围内的频率达到最大,该范围为鱼类偏好的距离范围。According to the video records of spatial distribution of individuals in the fish school taken in the lab,the distances among individuals in fish school measured and calculated by the body-centroid method（BCM）,segment method（SM） and broken line of three point method（BLM） indicate that the most of distances are varied in the range of 0.5-2 times body length（BL） while the number of individuals increasing to a certain level.The results by SM were basically same as the one from BLM,and the precision of BCM was lower than the others.When the body length was greater than 0.2 BL,the frequency of distance appearance of BLM was generally higher than SM’s and its result was more precise.And the distances calculated by means of the SM and BLM were mostly allocated in the range of 0.6-0.8 BL,which revealed that the range might be the preferred distance of the fish.

关 键 词：鱼群 个体间距 空间分布 偏好距离 

分 类 号：S917[农业科学—水产科学]